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US 4,805,282 AGranted
Process for revamping the stator blades of a gas turbine
AssigneeAmoco Corporation
InventorsBenjamin H. Reaves, William E. Nelson
Life of this patent
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Abstract
The stator blades (vanes) of a gas turbine are removed and restored in considerably less time with an easy-to-use, special cutter assembly which arcuately cuts the encased portions of the stator blades in an efficient and effective manner. The cutter assembly has special, adjustable control arms with a power-driven grinding wheel and a saddle assembly which serves as a guide template to facilitate setup and cutting of the stator blades.
Claims6
A process for revamping the stator blades of a gas turbine, comprising the steps of:
- removing the stator blades of a gas turbine by
- severing upper portions of the stator blades in a base ring section of an axial flow compressor case of said gas turbine with an arc air torch, thereby leaving lower stub portions of the stator blades,
- arcuately cutting the lower stub portions of the stator blades in said base ring section in two or more pieces with a grinding wheel of a cutter assembly,
- knocking, vibrating, and jarring loose the cut, lower stub portions of the stator blades from said base ring section by repetitively striking the cut, lower stub portions with a hammer, and
- emptying the loosened stub portions from grooved channels in the base ring section;
- and
- replacing the stator blades of the gas turbine by inserting new stator blades into the grooved channels of the axial flow compressor case at generally uniform intervals after said loosened stub portions have been removed.
4 more elements
Dependencies are inferred from the claim text.